Chest (joint detail)

Good old-fashioned dovetail construction. Someone discarded this chest (sans top). How could they do it?? It's very old, built out of a hardwood which I haven't identified yet, and appears to be entirely made with handtools. I thought that saving it from going to the landfill was an act in keeping with the title of one of Eric Sloane's books - "A Reverence for Wood."

Done